Dispenser



May 26, 1931. L. M. MccoRMlcK l-,`806,91

DISPENSER Filed March 5. 1929 I="1E 'l...

.FIE E soj Patented May 26, 1931 PATENT oFFlCE LENVIS` M. MCCORMCK, OF :PALO ALTO, CALIFORNIA DISPENSER Application led March 5,

lMyinvention relates to Vdispensing devices and particularly to devices of this kind wherein the dispensed substance is heated before being discharged. It is especially usei ful in dispensing an adhesive substance.

Adhesives are commonly sold in stick form and usually have such a relativelyhigh melting point that they are solids at ordinary temperatures. .It is therefore necessary Vto heatJ4 the adhesive before it can be applied.

Such `sticks are therefore vordinarily `placed directly in a. flame until the adhesive has reachedV a"temperatu're `above its meltingV point. With this manner of heating the adhesive, a thin even application cannot be readily secured, the fluid coming off the stick in blotches .which because of the viscous nature of the adhesive, cannot readily be spread evenlv over the surface 'to which itis being It is thereforean object of my invention to provide anv improved means for facilitating the heating and dispensing of substances, particularly adhesive materials. K Another object of my invention is to provide a dispenser construction which will enable an adhesive substance to 'be uniformly and conveniently discharged in an economicalA manner. j

A further object of my invention isto provide an improved means for heating and fusing a limited portion of an adhesive substance.

The invention possesses other advantageous features, some of which with the foregoing will be set forth at length in the following description where I shall outline in full that form of the dispenser of my invention, which I have selected for illustration in the drawings accompanying and forming part of the present specification. Inl said drawings I have shown one form of dispenser embodying my invention, but it is to be understcod that I do not limit myself to such form since the invention, as set forth in the claims, may be embodied inra plurality of forms. Y

In the drawings to which I have made reference, Fig. 1 is a side elevation of apreferred form of the device of my invention.

192e. serial No. :se-4,366,

` my invention along the section line Ll-ll'of Fig. 1. Y

Fig. 5 is a cross-section thru the device of my invention, the section line correspond" ing to the line 5-5 of Fig.v 1.

Fig. 6 is a cross section through another form of a device of my invention,the section corresponding to that shown in Fig. 5.

In its preferred *form the device of my invention comprises a member adapted to be heated and formed of good heat conducting material, means for feeding a disc of adhesive against the member, and an applicator for applying the melted adhesive. A

As is shown in the drawings, I preferably provide a suitable retainer 6 within which a stick 7 of adhesive is disposed. While the retainer maybe made of a-variety of materials, it is preferably constructed of a relatively poor conductor of heat suchas brass for reasons which will presently appear. The retainer is usually sealed at one end by a removable cap 8, which can be retained in frictional engagement with the retainer.

. To conveniently feed the stick relative to the retainer I have shown therretainer 6 with a slot 11 which extends longitudinally for a `means to expel or repel the stick relative to the retainer. p

' Toretain the stick in any desired position Vin the retainer I preferably provide an ar.-

cuate member 16 partially'encircling the retainer, and having a shoulder 17 adapt-ed to travel-in the slot 11. Aspring 18 is suitably attached to the member 16 and is biased away from the same. Pin 12 extends through an opening inmember16 and springlS and has an enlarged end portion 19, so that it cannot normally'be removed from its position.

Adjacent one end of the retainer, means are provided for conducting heat to the adhesive stick and for applying the melted adhesive. I usually manufacture these means by attaching a supporting member 2l to the retainer 6 by any means suitable such as bolts 22. Disposed between the supporting member and the retainer is a layer 20 of a heat insulating material, such as mica or asbestos. Carried by the supporting member 2l there is an adhesive fusing member 23, shown connected to member 2l by suitable means such as. bolts 24. The adhesive fusing member is preferably formed of a plate substantially as large as the end of the retainer and is spaced from the retainer so that a substantial portion of the adhesive adjacent to the end being fused is out of direct contact with the heat conducting surfaces. Disposed between the supporting member and the adhesive fusing member is a layer 20 of a suitable heat insulating material, such as mica. The provision of the non-conductor of heat between the supporting member, the adhesive fusing member and the retainer reduces the quantity of heat transmitted to the retainer and to the main body of the adhesive stick.

Connected to the adhesive fusing member 23 there is a heat supplying member 2G preferably forming a continuous projection of member 28 and so positioned with respect to it as to provide a rounded edge 27 forming an application surface. rlhe fusing member and the heat supplying member are preferably formed of good conductors of heat such as copper and are in intimate heat transmitting relationship.

In operation the heat supplying member is heated in any suitable manner-such as by placing it in the flame of an alcohol lamp. rlhe adhesive is fed from the container into contact with the fusing member and the heat transmitted to the fusing member melts the adhesive in contact with it. rl`he melted adhesive iiows down the member to the application surface and when a suitable quantity of the adhesive has accumulated thereon the operator brings the application surface into contact with the surface of a body upon which adhesive is to be applied, as is indicated at 3l. Then, by drawing the application sur face 27 over the body a thin layer of adhesive is spread evenly onto the body. The operator, by either continuously or intermittently advancing the stick 7 by pressure upon pin l2, may readily control the thickness of the layer of adhesive applied to the body.

It is characteristic of my invention that the manner of heating the adhesive melts only that portion of the stick which is in direct contact with the fusing member. rlhe melted adhesive is continually removed as it melts and thereby enables a neat, even, economical application of the liuid to be made.

This device is also particularly advantageous where it is desirable that the substance to be applied may be heated out of direct contact with a flame. Many substances are altered by contact With a llame and this device enables such substances to be melted and applied without any such detrimental alteration.

I claim:

1. A dispensing device for an adhesive in stick form comprising a retainer within which an adhesive stick is movable, and a member joined to said retainer and having a contact surface in spaced relationship to the retainer so that the adhesive stick may be advanced into contact therewith, a portion of said member continuing beyond said surface and being disposed with respect thereto to provide an application surface, said portion continuing to form a lip for receiving and supplying heat to the application surface and to the contact surface.

2. A device for melting and applying adhesive from a stick comprising a casing for the stick, said casing being open at one end so that the stick protrudes therefrom, a 'strip member positioned on said casing in heat insulating relationship thereto, a portion of said member being positioned across said open end to contact with the protruding stick of adhesive, another portion of the strip member being curved upon itself to forman application surface for melted adhesive, and means for moving said adhesive stick into contact with the contact po1tion of the member.

3. A device for melting and applying adhesive from a stick comprising a casing for the stick, said casing being slotted longitudinally for a portion of its length and being opened at one end so that the stick protrudes therefrom, a member positioned on said casing in heat insulating relationship thereto, a portion of said member being positioned across said end to contact with the protrud ing stick of adhesive, another portion of the member being curved upon itself to form an application surface for melted adhesive, said another portion continuing to provide a surface adapted to be heated, and a pin for insertion through the slot into the stick to provide means for moving the stick relative to the casing and into engagement with said contact portion of the member.

l. A device for melting and applying adhesive from an adhesive stick comprising a casing 'from which the stick is movable, and a member of heat conducting material, said vmember being spaced from the casing and having a portion positioned to Contact with the stick, said member continuing from the portion to provide an application surface and further continuing to form a lip to be heated.

In testimony whereof, I have hereunto set my hand.

LEI/VIS M. MCCORMICK 

